Tests to ensure column names are matching data.

name: empty.html?xhr/devtools/network/resources
method: GET
status: 200OK
protocol: http/1.1
scheme: http
domain: 127.0.0.1
remote-address: 127.0.0.1:8000
type: xhr
initiator: network-columns-visible.js:18Script
cookies: 0
set-cookies: 0
priority: HighHigh
response-header-cache-control: 
response-header-connection: Keep-Alive
response-header-content-encoding: 
response-header-content-length: 0
response-header-vary: